-- Standard awesome library
local gears = require("gears")
local awful = require("awful")
require("awful.autofocus")
-- Widget and layout library
local wibox = require("wibox")
-- Theme handling library
local beautiful = require("beautiful")
-- Notification library
local naughty = require("naughty")
local menubar = require("menubar")
local hotkeys_popup = require("awful.hotkeys_popup").widget
-- Enable VIM help for hotkeys widget when client with matching name is opened:
require("awful.hotkeys_popup.keys.vim")
-- Enabling transparency
awful.util.spawn_with_shell("compton &")

-- {{{ Error handling
-- Check if awesome encountered an error during startup and fell back to
-- another config (This code will only ever execute for the fallback config)
if awesome.startup_errors then
    naughty.notify({ preset = naughty.config.presets.critical,
    title = "Oops, there were errors during startup!",
    text = awesome.startup_errors })
end

-- Handle runtime errors after startup
do
    local in_error = false
    awesome.connect_signal("debug::error", function (err)
        -- Make sure we don't go into an endless error loop
        if in_error then return end
        in_error = true

        naughty.notify({ preset = naughty.config.presets.critical,
        title = "Oops, an error happened!",
        text = tostring(err) })
        in_error = false
    end)
end
-- }}}

-- {{{ Variable definitions
-- Themes define colours, icons, font and wallpapers.
beautiful.init(awful.util.get_themes_dir() .. "zenburn/theme.lua")

-- This is used later as the default terminal and editor to run.
terminal = "termite"
editor = os.getenv("EDITOR") or "nano"
editor_cmd = terminal .. " -e " .. editor

-- Default modkey.
-- Usually, Mod4 is the key with a logo between Control and Alt.
-- If you do not like this or do not have such a key,
-- I suggest you to remap Mod4 to another key using xmodmap or other tools.
-- However, you can use another modifier like Mod1, but it may interact with others.
modkey = "Mod4"

-- Table of layouts to cover with awful.layout.inc, order matters.
awful.layout.layouts = {
    awful.layout.suit.floating,
    awful.layout.suit.tile,
    awful.layout.suit.tile.left,
    awful.layout.suit.tile.bottom,
    awful.layout.suit.tile.top,
    awful.layout.suit.fair,
    awful.layout.suit.fair.horizontal,
    awful.layout.suit.spiral,
    awful.layout.suit.spiral.dwindle,
    awful.layout.suit.max,
    awful.layout.suit.max.fullscreen,
    awful.layout.suit.magnifier,
    awful.layout.suit.corner.nw,
    -- awful.layout.suit.corner.ne,
    -- awful.layout.suit.corner.sw,
    -- awful.layout.suit.corner.se,
}
-- }}}

-- {{{ Helper functions
local function client_menu_toggle_fn()
    local instance = nil

    return function ()
        if instance and instance.wibox.visible then
            instance:hide()
            instance = nil
        else
            instance = awful.menu.clients({ theme = { width = 250 } })
        end
    end
end
-- }}}

-- {{{ Menu
-- Create a launcher widget and a main menu
myawesomemenu = {
    { "hotkeys", function() return false, hotkeys_popup.show_help end},
    { "manual", terminal .. " -e man awesome" },
    { "edit config", editor_cmd .. " " .. awesome.conffile },
    { "restart", awesome.restart },
    { "quit", function() awesome.quit() end}
}

mymainmenu = awful.menu({ items = { { "awesome", myawesomemenu, beautiful.awesome_icon },
{ "open terminal", terminal }
                                  }
                              })

                              mylauncher = awful.widget.launcher({ image = beautiful.awesome_icon,
                              menu = mymainmenu })

                              -- Menubar configuration
                              menubar.utils.terminal = terminal -- Set the terminal for applications that require it
                              -- }}}

                              -- Keyboard map indicator and switcher
                              mykeyboardlayout = awful.widget.keyboardlayout()

                              -- {{{ Wibar
                              -- Create a textclock widget
                              mytextclock = wibox.widget.textclock()

                              -- Create a wibox for each screen and add it
                              local taglist_buttons = gears.table.join(
                              awful.button({ }, 1, function(t) t:view_only() end),
                              awful.button({ modkey }, 1, function(t)
                                  if client.focus then
                                      client.focus:move_to_tag(t)
                                  end
                              end),
                              awful.button({ }, 3, awful.tag.viewtoggle),
                              awful.button({ modkey }, 3, function(t)
                                  if client.focus then
                                      client.focus:toggle_tag(t)
                                  end
                              end),
                              awful.button({ }, 4, function(t) awful.tag.viewnext(t.screen) end),
                              awful.button({ }, 5, function(t) awful.tag.viewprev(t.screen) end)
                              )

                              local tasklist_buttons = gears.table.join(
                              awful.button({ }, 1, function (c)
                                  if c == client.focus then
                                      c.minimized = true
                                  else
                                      -- Without this, the following
                                      -- :isvisible() makes no sense
                                      c.minimized = false
                                      if not c:isvisible() and c.first_tag then
                                          c.first_tag:view_only()
                                      end
                                      -- This will also un-minimize
                                      -- the client, if needed
                                      client.focus = c
                                      c:raise()
                                  end
                              end),
                              awful.button({ }, 3, client_menu_toggle_fn()),
                              awful.button({ }, 4, function ()
                                  awful.client.focus.byidx(1)
                              end),
                              awful.button({ }, 5, function ()
                                  awful.client.focus.byidx(-1)
                              end))

                              local function set_wallpaper(s)
                                  -- Wallpaper
                                  if beautiful.wallpaper then
                                      local wallpaper = beautiful.wallpaper
                                      -- If wallpaper is a function, call it with the screen
                                      if type(wallpaper) == "function" then
                                          wallpaper = wallpaper(s)
                                      end
                                      gears.wallpaper.maximized(wallpaper, s, true)
                                  end
                              end

                              -- Re-set wallpaper when a screen's geometry changes (e.g. different resolution)
                              screen.connect_signal("property::geometry", set_wallpaper)

                              awful.screen.connect_for_each_screen(function(s)
                                  -- Wallpaper
                                  set_wallpaper(s)

                                  -- Each screen has its own tag table.
                                  awful.tag({ "1", "2", "3", "4", "5", "6", "7", "8", "9" }, s, awful.layout.layouts[1])

                                  -- Create a promptbox for each screen
                                  s.mypromptbox = awful.widget.prompt()
                                  -- Create an imagebox widget which will contains an icon indicating which layout we're using.
                                  -- We need one layoutbox per screen.
                                  s.mylayoutbox = awful.widget.layoutbox(s)
                                  s.mylayoutbox:buttons(gears.table.join(
                                  awful.button({ }, 1, function () awful.layout.inc( 1) end),
                                  awful.button({ }, 3, function () awful.layout.inc(-1) end),
                                  awful.button({ }, 4, function () awful.layout.inc( 1) end),
                                  awful.button({ }, 5, function () awful.layout.inc(-1) end)))
                                  -- Create a taglist widget
                                  s.mytaglist = awful.widget.taglist(s, awful.widget.taglist.filter.all, taglist_buttons)

                                  -- Create a tasklist widget
                                  s.mytasklist = awful.widget.tasklist(s, awful.widget.tasklist.filter.currenttags, tasklist_buttons)

                                  -- Create the wibox
                                  s.mywibox = awful.wibar({ position = "top", screen = s })

                                  -- Add widgets to the wibox
                                  s.mywibox:setup {
                                      layout = wibox.layout.align.horizontal,
                                      { -- Left widgets
                                      layout = wibox.layout.fixed.horizontal,
                                      mylauncher,
                                      s.mytaglist,
                                      s.mypromptbox,
                                  },
                                  s.mytasklist, -- Middle widget
                                  { -- Right widgets
                                  layout = wibox.layout.fixed.horizontal,
                                  mykeyboardlayout,
                                  wibox.widget.systray(),
                                  mytextclock,
                                  s.mylayoutbox,
                              },
                          }
                      end)
                      -- }}}

                      -- {{{ Mouse bindings
                      root.buttons(gears.table.join(
                      awful.button({ }, 3, function () mymainmenu:toggle() end),
                      awful.button({ }, 4, awful.tag.viewnext),
                      awful.button({ }, 5, awful.tag.viewprev)
                      ))
                      -- }}}

                      -- {{{ Key bindings
                      globalkeys = gears.table.join(
                      awful.key({ modkey,           }, "s",      hotkeys_popup.show_help,
                      {description="show help", group="awesome"}),
                      awful.key({ modkey,           }, "Left",   awful.tag.viewprev,
                      {description = "view previous", group = "tag"}),
                      awful.key({ modkey,           }, "Right",  awful.tag.viewnext,
                      {description = "view next", group = "tag"}),
                      awful.key({ modkey,           }, "Escape", awful.tag.history.restore,
                      {description = "go back", group = "tag"}),

                      awful.key({ modkey,           }, "j",
                      function ()
                          awful.client.focus.byidx( 1)
                      end,
                      {description = "focus next by index", group = "client"}
                      ),
                      awful.key({ modkey,           }, "k",
                      function ()
                          awful.client.focus.byidx(-1)
                      end,
                      {description = "focus previous by index", group = "client"}
                      ),
                      awful.key({ modkey,           }, "w", function () mymainmenu:show() end,
                      {description = "show main menu", group = "awesome"}),

                      -- Layout manipulation
                      awful.key({ modkey, "Shift"   }, "j", function () awful.client.swap.byidx(  1)    end,
                      {description = "swap with next client by index", group = "client"}),
                      awful.key({ modkey, "Shift"   }, "k", function () awful.client.swap.byidx( -1)    end,
                      {description = "swap with previous client by index", group = "client"}),
                      awful.key({ modkey, "Control" }, "j", function () awful.screen.focus_relative( 1) end,
                      {description = "focus the next screen", group = "screen"}),
                      awful.key({ modkey, "Control" }, "k", function () awful.screen.focus_relative(-1) end,
                      {description = "focus the previous screen", group = "screen"}),
                      awful.key({ modkey,           }, "u", awful.client.urgent.jumpto,
                      {description = "jump to urgent client", group = "client"}),
                      awful.key({ modkey,           }, "Tab",
                      function ()
                          awful.client.focus.history.previous()
                          if client.focus then
                              client.focus:raise()
                          end
                      end,
                      {description = "go back", group = "client"}),

                      -- Standard program
                      awful.key({ modkey,           }, "Return", function () awful.spawn(terminal) end,
                      {description = "open a terminal", group = "launcher"}),
                      awful.key({ modkey, "Control" }, "r", awesome.restart,
                      {description = "reload awesome", group = "awesome"}),
                      awful.key({ modkey, "Shift"   }, "q", awesome.quit,
                      {description = "quit awesome", group = "awesome"}),

                      awful.key({ modkey,           }, "l",     function () awful.tag.incmwfact( 0.05)          end,
                      {description = "increase master width factor", group = "layout"}),
                      awful.key({ modkey,           }, "h",     function () awful.tag.incmwfact(-0.05)          end,
                      {description = "decrease master width factor", group = "layout"}),
                      awful.key({ modkey, "Shift"   }, "h",     function () awful.tag.incnmaster( 1, nil, true) end,
                      {description = "increase the number of master clients", group = "layout"}),
                      awful.key({ modkey, "Shift"   }, "l",     function () awful.tag.incnmaster(-1, nil, true) end,
                      {description = "decrease the number of master clients", group = "layout"}),
                      awful.key({ modkey, "Control" }, "h",     function () awful.tag.incncol( 1, nil, true)    end,
                      {description = "increase the number of columns", group = "layout"}),
                      awful.key({ modkey, "Control" }, "l",     function () awful.tag.incncol(-1, nil, true)    end,
                      {description = "decrease the number of columns", group = "layout"}),
                      awful.key({ modkey,           }, "space", function () awful.layout.inc( 1)                end,
                      {description = "select next", group = "layout"}),
                      awful.key({ modkey, "Shift"   }, "space", function () awful.layout.inc(-1)                end,
                      {description = "select previous", group = "layout"}),

                      awful.key({ modkey, "Control" }, "n",
                      function ()
                          local c = awful.client.restore()
                          -- Focus restored client
                          if c then
                              client.focus = c
                              c:raise()
                          end
                      end,
                      {description = "restore minimized", group = "client"}),

                      -- Prompt
                      awful.key({ modkey },            "r",     function () awful.screen.focused().mypromptbox:run() end,
                      {description = "run prompt", group = "launcher"}),

                      awful.key({ modkey }, "x",
                      function ()
                          awful.prompt.run {
                              prompt       = "Run Lua code: ",
                              textbox      = awful.screen.focused().mypromptbox.widget,
                              exe_callback = awful.util.eval,
                              history_path = awful.util.get_cache_dir() .. "/history_eval"
                          }
                      end,
                      {description = "lua execute prompt", group = "awesome"}),
                      -- Menubar
                      awful.key({ modkey }, "p", function() menubar.show() end,
                      {description = "show the menubar", group = "launcher"})
                      )

                      clientkeys = gears.table.join(
                      awful.key({ modkey,           }, "f",
                      function (c)
                          c.fullscreen = not c.fullscreen
                          c:raise()
                      end,
                      {description = "toggle fullscreen", group = "client"}),
                      awful.key({ modkey, "Shift"   }, "c",      function (c) c:kill()                         end,
                      {description = "close", group = "client"}),
                      awful.key({ modkey, "Control" }, "space",  awful.client.floating.toggle                     ,
                      {description = "toggle floating", group = "client"}),
                      awful.key({ modkey, "Control" }, "Return", function (c) c:swap(awful.client.getmaster()) end,
                      {description = "move to master", group = "client"}),
                      awful.key({ modkey,           }, "o",      function (c) c:move_to_screen()               end,
                      {description = "move to screen", group = "client"}),
                      awful.key({ modkey,           }, "t",      function (c) c.ontop = not c.ontop            end,
                      {description = "toggle keep on top", group = "client"}),
                      awful.key({ modkey,           }, "n",
                      function (c)
                          -- The client currently has the input focus, so it cannot be
                          -- minimized, since minimized clients can't have the focus.
                          c.minimized = true
                      end ,
                      {description = "minimize", group = "client"}),
                      awful.key({ modkey,           }, "m",
                      function (c)
                          c.maximized = not c.maximized
                          c:raise()
                      end ,
                      {description = "(un)maximize", group = "client"}),
                      awful.key({ modkey, "Control" }, "m",
                      function (c)
                          c.maximized_vertical = not c.maximized_vertical
                          c:raise()
                      end ,
                      {description = "(un)maximize vertically", group = "client"}),
                      awful.key({ modkey, "Shift"   }, "m",
                      function (c)
                          c.maximized_horizontal = not c.maximized_horizontal
                          c:raise()
                      end ,
                      {description = "(un)maximize horizontally", group = "client"}),
                      awful.key({ modkey, "Control" }, "t",
                      function (c)
                          -- toggle titlebar
                          awful.titlebar.toggle(c)
                      end,
                      {description = "Enable the titlebar"})
                      )

                      -- Bind all key numbers to tags.
                      -- Be careful: we use keycodes to make it work on any keyboard layout.
                      -- This should map on the top row of your keyboard, usually 1 to 9.
                      for i = 1, 9 do
                          globalkeys = gears.table.join(globalkeys,
                          -- View tag only.
                          awful.key({ modkey }, "#" .. i + 9,
                          function ()
                              local screen = awful.screen.focused()
                              local tag = screen.tags[i]
                              if tag then
                                  tag:view_only()
                              end
                          end,
                          {description = "view tag #"..i, group = "tag"}),
                          -- Toggle tag display.
                          awful.key({ modkey, "Control" }, "#" .. i + 9,
                          function ()
                              local screen = awful.screen.focused()
                              local tag = screen.tags[i]
                              if tag then
                                  awful.tag.viewtoggle(tag)
                              end
                          end,
                          {description = "toggle tag #" .. i, group = "tag"}),
                          -- Move client to tag.
                          awful.key({ modkey, "Shift" }, "#" .. i + 9,
                          function ()
                              if client.focus then
                                  local tag = client.focus.screen.tags[i]
                                  if tag then
                                      client.focus:move_to_tag(tag)
                                  end
                              end
                          end,
                          {description = "move focused client to tag #"..i, group = "tag"}),
                          -- Toggle tag on focused client.
                          awful.key({ modkey, "Control", "Shift" }, "#" .. i + 9,
                          function ()
                              if client.focus then
                                  local tag = client.focus.screen.tags[i]
                                  if tag then
                                      client.focus:toggle_tag(tag)
                                  end
                              end
                          end,
                          {description = "toggle focused client on tag #" .. i, group = "tag"}),
                          -- Brightness
                          awful.key({}, "XF86MonBrightnessUp",
                          function()
                              awful.util.spawn("xbacklight -inc 10")
                          end,
                          {description = "increment brightness by 10"}),
                          awful.key({}, "XF86MonBrightnessDown", function()
                              awful.util.spawn("xbacklight -dec 10")
                          end,
                          {description = "decrement brightness by 10"}),
                          -- slock
                          awful.key({ modkey, "Control" }, "s",
                          function()
                              awful.util.spawn("slock")
                          end,
                          {description = "screen locker"})
                          )
                      end

                      clientbuttons = gears.table.join(
                      awful.button({ }, 1, function (c) client.focus = c; c:raise() end),
                      awful.button({ modkey }, 1, awful.mouse.client.move),
                      awful.button({ modkey }, 3, awful.mouse.client.resize))

                      -- Set keys
                      root.keys(globalkeys)
                      -- }}}

                      -- {{{ Rules
                      -- Rules to apply to new clients (through the "manage" signal).
                      awful.rules.rules = {
                          -- All clients will match this rule.
                          { rule = { },
                          properties = { border_width = beautiful.border_width,
                          border_color = beautiful.border_normal,
                          focus = awful.client.focus.filter,
                          raise = true,
                          keys = clientkeys,
                          buttons = clientbuttons,
                          screen = awful.screen.preferred,
                          placement = awful.placement.no_overlap+awful.placement.no_offscreen
                      }
                  },

                  -- Floating clients.
                  { rule_any = {
                      instance = {
                          "DTA",  -- Firefox addon DownThemAll.
                          "copyq",  -- Includes session name in class.
                      },
                      class = {
                          "Arandr",
                          "Gpick",
                          "Kruler",
                          "MessageWin",  -- kalarm.
                          "Sxiv",
                          "Wpa_gui",
                          "pinentry",
                          "veromix",
                          "xtightvncviewer"},

                          name = {
                              "Event Tester",  -- xev.
                          },
                          role = {
                              "AlarmWindow",  -- Thunderbird's calendar.
                              "pop-up",       -- e.g. Google Chrome's (detached) Developer Tools.
                          }
                      }, properties = { floating = true }},

                      -- Add titlebars to normal clients and dialogs
                      { rule_any = {type = { "normal", "dialog" }
                  }, properties = { titlebars_enabled = true }
              },

              -- Set Firefox to always map on the tag named "2" on screen 1.
              -- { rule = { class = "Firefox" },
              --   properties = { screen = 1, tag = "2" } },
          }
          -- }}}

          -- {{{ Signals
          -- Signal function to execute when a new client appears.
          client.connect_signal("manage", function (c)
              -- Set the windows at the slave,
              -- i.e. put it at the end of others instead of setting it master.
              -- if not awesome.startup then awful.client.setslave(c) end

              if awesome.startup and
                  not c.size_hints.user_position
                  and not c.size_hints.program_position then
                  -- Prevent clients from being unreachable after screen count changes.
                  awful.placement.no_offscreen(c)
              end
          end)

          -- Add a titlebar if titlebars_enabled is set to true in the rules.
          client.connect_signal("request::titlebars", function(c)
              -- buttons for the titlebar
              local buttons = gears.table.join(
              awful.button({ }, 1, function()
                  client.focus = c
                  c:raise()
                  awful.mouse.client.move(c)
              end),
              awful.button({ }, 3, function()
                  client.focus = c
                  c:raise()
                  awful.mouse.client.resize(c)
              end)
              )
              awful.titlebar(c) : setup {
                  -- Hide the titlebar after creation so it can be toggled afterwards
                  awful.titlebar.hide(c),
                  { -- Left
                  awful.titlebar.widget.iconwidget(c),
                  buttons = buttons,
                  layout  = wibox.layout.fixed.horizontal
              },
              { -- Middle
              { -- Title
              align  = "center",
              widget = awful.titlebar.widget.titlewidget(c)
          },
          buttons = buttons,
          layout  = wibox.layout.flex.horizontal
      },
      { -- Right
      awful.titlebar.widget.floatingbutton (c),
      awful.titlebar.widget.maximizedbutton(c),
      awful.titlebar.widget.stickybutton   (c),
      awful.titlebar.widget.ontopbutton    (c),
      awful.titlebar.widget.closebutton    (c),
      layout = wibox.layout.fixed.horizontal()
  },
  layout = wibox.layout.align.horizontal
  }
end)

-- Enable sloppy focus, so that focus follows mouse.
client.connect_signal("mouse::enter", function(c)
    if awful.layout.get(c.screen) ~= awful.layout.suit.magnifier
        and awful.client.focus.filter(c) then
        client.focus = c
    end
end)

client.connect_signal("focus", function(c) c.border_color = beautiful.border_focus end)
client.connect_signal("unfocus", function(c) c.border_color = beautiful.border_normal end)
-- }}}
